2007 INFINITI QX56 service

NAVIGATION SYSTEM
AV-111
< SERVICE INFORMATION >
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1. Turn ignition switch OFF.
2. Check continuity between the following NAVI control unit con-
nector terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Power Supply and Ground Circuit Inspection for Display Control UnitINFOID:0000000003533725
1.CHECK FUSE
Make sure the following fuses of the display control unit are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3 .
2.CHECK POWER SUPPLY CIRCUIT
1. Disconnect display control unit connector M94.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between display control unit and fuse.
3.CHECK GROUND CIRCUIT
Check continuity between the following display control unit connec-
tor terminals and ground.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
B151 1 Ground OFF Yes
WKIA4207E
Te r m i n a l s
Power source Fuse No.
Connector Terminal
M941 Battery power 31
10 ACC power 4
Terminals Ignition switch position
(+)
(–) OFF ACC ON
Connector Terminal
M941
GroundBattery
voltageBattery
voltageBattery
voltage
10 0VBattery
voltageBattery
voltage
WKIA1373E
Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
M94 3 Ground OFF Yes
SKIA4293E

AV-112
< SERVICE INFORMATION >
NAVIGATION SYSTEM
Power Supply and Ground Circuit Inspection for Display Unit
INFOID:0000000003533726
1. CHECK POWER SUPPLY AND GROUND CIRCUIT FOR DISPLAY CONTROL UNIT
1. Check power supply and ground circuit for display control unit. Refer to AV- 111 , "
Power Supply and
Ground Circuit Inspection for Display Control Unit".
OK or NG
OK >> GO TO 2.
NG >> Repair malfunctioning part.
2. CHECK POWER SUPPLY CIRCUIT FOR DISPLAY UNIT
1. Disconnect display unit connector M93.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 ter-
minals 2, 3 and ground.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94.
3. Check continuity between display control unit harness connector M94 terminals 2, 4 and display unit har-
ness connector M93 terminals 2, 3.
4. Check continuity between display unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal and Installation".
NG >> Repair harness.
4. CHECK GROUND CIRCUITApprox. 9V
WKIA1227E
Te r m i n a l s
Continuity Display control unit Display unit
Connector Terminal Connector Terminal
M942
M932
Ye s
4 3
Te r m i n a l s
Continuity Display unit
—
Connector Terminal
M932
Ground No
3
WKIA1229E

NAVIGATION SYSTEM
AV-113
< SERVICE INFORMATION >
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1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector M93
terminals 13, 14 and ground.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. CHECK HARNESS
1. Disconnect display control unit connector M94.
2. Check continuity between display unit harness connector M93
terminals 13, 14 and display control unit harness connector M94
terminals 5, 7.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal
and Installation".
NG >> Repair harness.
6.CHECK GROUND CIRCUIT
Check continuity between display unit and ground as follows.
1.
OK or NG
OK >> Inspection End.
NG >> Repair harness.
Power Supply and Ground Circuit Inspection for AV SwitchINFOID:0000000003533727
1.CHECK FUSE
Make sure the following fuses of the AV switch are not blown.
OK or NG
OK >> GO TO 2.
NG >> If fuse is blown, be sure to eliminate cause of blown fuse before installing new fuse. Refer to PG-
3.
2.CHECK POWER SUPPLY CIRCUITContinuity should exist.
WKIA2079E
Continuity should exist.
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Te r m i n a l s
Ignition
switchContinuity
Connector Terminal —
M93 1 Ground OFF Yes
WKIA1228E
Te r m i n a l s
Power source Fuse No.
Connector Terminal
M981 Battery power 31
2 ACC power 4

AV-114
< SERVICE INFORMATION >
NAVIGATION SYSTEM
1. Disconnect AV switch connector.
2. Check voltage between connector terminals and ground as fol-
lows.
OK or NG
OK >> GO TO 3.
NG >> Check harness for open between AV switch and fuse.
3.CHECK GROUND CIRCUIT
Check continuity between AV switch and ground as follows.
OK or NG
OK >> Inspection End.
NG >> Repair or replace harness.
Vehicle Speed Signal Inspection for NAVI Control UnitINFOID:0000000003533728
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152, combination
meter connector M24 and display control unit connector M94.
3. Check continuity between NAVI control unit harness connector
B152 (B) terminal 66 and combination meter harness connector
M24 (A) terminal 29.
4. Check continuity between NAVI control unit harness connector
B152 (B) terminal 66 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK 1: VEHICLE SPEED SIGNAL
Terminals Ignition switch position
(+)
(–) OFF ACC ON
Connector Terminal
M981
GroundBattery
voltageBattery
voltageBattery
voltage
20VBattery
voltageBattery
voltage
WKIA1767E
Te r m i n a l s
Ignition switch Continuity
Connector Terminal —
M98 5 Ground OFF Yes
WKIA1768E
Continuity should exist.
Continuity should not exist.
WKIA4445E

NAVIGATION SYSTEM
AV-115
< SERVICE INFORMATION >
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1. Connect NAVI control unit connector.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector
B152 terminal 66 and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace NAVI control unit. Refer to AV-145, "
Removal
and Installation".
3.CHECK 2: VEHICLE SPEED SIGNAL
1. Connect combination meter connector and display control unit
connector.
2. Drive vehicle at a constant speed.
3. Check signal between NAVI control unit harness connector
B152 terminal 66 and ground with CONSULT-ll or oscilloscope.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check combination meter system. Refer to DI-17, "
Vehicle Speed Signal Inspection".
Vehicle Speed Signal Inspection for Display Control UnitINFOID:0000000003533729
1.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94, combination
meter connector M24 and NAVI control unit connector B152.
3. Check continuity between display control unit harness connector
M94 terminal 16 and combination meter harness connector M24
terminal 29.
4. Check continuity between display control unit harness connector
M94 terminal 16 and ground.
OK or NG
OK >> GO TO 2.
NG >> Repair harness.
2.CHECK 1: VEHICLE SPEED SIGNALApprox. 3.5V or more
WKIA4209E
66 - Ground : Refer to AV-89, "Terminal
and Reference Value for NAVI
Control Unit".
WKIA4210E
Continuity should exist.
Continuity should not exist.
WKIA1506E

AV-116
< SERVICE INFORMATION >
NAVIGATION SYSTEM
1. Connect display control unit connector.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector
M94 terminal 16 and ground.
OK or NG
OK >> GO TO 3.
NG >> Replace display control unit. Refer to AV-145, "
Removal
and Installation".
3.CHECK 2: VEHICLE SPEED SIGNAL
1. Connect combination meter connector M24 and NAVI control
unit connector B152.
2. Drive vehicle at a constant speed.
3. Check signal between display control unit harness connector
M94 terminal 16 and ground with CONSULT-ll or oscilloscope.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check combination meter system. Refer to DI-17, "
Vehicle Speed Signal Inspection".
Illumination Signal Inspection for NAVI Control UnitINFOID:0000000003533730
1.CHECK ILLUMINATION SIGNAL
1. Turn the ignition switch ON.
2. Check voltage between NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check harness for open or short between NAVI control unit and IPDM E/R.
Illumination Signal Inspection for Display Control UnitINFOID:0000000003533731
1.CHECK ILLUMINATION SIGNALApprox. 3.5V or more
SKIA4297E
16 - Ground : Refer to AV-91, "Terminal
and Reference Value for Dis-
play Control unit".
SKIA4616E
Te r m i n a l s
Lighting switch position
(+)
(–)
Connector Terminal1st or 2nd po-
sitionOFF
B152 61 GroundBattery
voltageApprox. 0V
WKIA4211E

NAVIGATION SYSTEM
AV-117
< SERVICE INFORMATION >
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AV
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1. Turn ignition switch ON.
2. Check voltage between display control unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check harness for open or short between display control unit and IPDM E/R.
Ignition Signal Inspection for NAVI Control UnitINFOID:0000000003533732
1.CHECK IGNITION SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. Check voltage between NAVI control unit harness connector
B152 terminal 63 and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check harness for open or short between NAVI control
unit and fuse.
Ignition Signal Inspection for Display Control UnitINFOID:0000000003533733
1.CHECK IGNITION SIGNAL
1. Disconnect display control unit connector M94.
2. Turn ignition switch ON.
3. Check voltage between display control unit harness connector
M94 terminal 12 and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal
and Installation".
NG >> Check harness for open or short between display con-
trol unit and fuse.
Reverse Signal Inspection for NAVI Control UnitINFOID:0000000003533734
1.CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 8 0
.
2.CHECK REVERSE SIGNAL
Te r m i n a l s
Lighting switch position
(+)
(–)
Connector Terminal1st or 2nd po-
sitionOFF
M94 14 GroundBattery
voltageApprox. 0V
SKIA4299E
Battery voltage should exist.
WKIA4212E
Battery voltage should exist.
WKIA1230E

AV-118
< SERVICE INFORMATION >
NAVIGATION SYSTEM
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. With the A/T selector lever in R-position, check voltage between
NAVI control unit and ground.
OK or NG
OK >> Replace NAVI control unit. Refer to AV-145, "Removal and Installation".
NG >> Check harness for open or short between NAVI control unit and back-up lamp position relay.
Reverse Signal Inspection for Display Control UnitINFOID:0000000003533735
1.CHECK REVERSE LAMP
1. Turn ignition switch ON.
2. Place A/T selector lever into R-position. Do back-up lamps come on?
YES or NO
YES >> GO TO 2.
NO >> Check back-up lamp system. Refer to LT- 8 0
.
2.CHECK REVERSE SIGNAL
1. Disconnect display control unit connector M94.
2. Turn ignition switch ON.
3. With the A/T selector lever in R-position, check voltage between
display control unit and ground.
OK or NG
OK >> Replace display control unit. Refer to AV-145, "Removal and Installation".
NG >> Check harness for open or short between display control unit and back-up lamp position relay.
AV Communication Line Check (Between Display Control Unit and NAVI Control Unit)
INFOID:0000000003533736
1.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit for NAVI control unit. Refer to AV-110, "
Power Supply and Ground Cir-
cuit Inspection for NAVI Control Unit".
OK or NG
OK >> GO TO 2.
NG >> Check the malfunctioning parts.
2.CHECK HARNESS
1. Turn ignition switch OFF.
2. Disconnect NAVI control unit connector B152 and display control unit connector M95.
3. Check continuity between NAVI control unit and display control unit.
Te r m i n a l s
Selector lever position
(+)
(–)
Connector Terminal R-positionOther than R-po-
sition
B152 65 Ground Battery voltage Approx. 0V
WKIA4213E
Te r m i n a l s
Selector lever position
(+)
(–)
Connector Terminal R-positionOther than
R-position
M94 6 Ground Battery voltage Approx. 0V
SKIA4303E